USB Powered: Adopting new advanced cold diffusing technology, this device can be powered by your car adapter, laptop, and power bank. space-saving ergonomic size and whisper-quiet operation. Directly Atomize Oils: Compared with traditional essential oil diffusers, this diffuser can atomize all types of essential oils. Moreover, it requires no more cleaning of the water tank. Compact Size: Its compact size allows it to be carried anywhere. It can be used in cars, offices, and small areas like your bedroom. Healthy & Safe: This diffuser is designed to match the latest aromatherapy trend in Europe and America. It avoids the water dilution to the oil, so people can get the full benefits of the essential oils.